12517538344 has 32 divisors (see below), whose sum is σ = 23825430720. Its totient is φ = 6164332416.

The previous prime is 12517538321. The next prime is 12517538351. The reversal of 12517538344 is 44383571521.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 12517538344.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 409827 + ... + 439309.

It is an arithmetic number, because the mean of its divisors is an integer number (744544710).

Almost surely, 2^12517538344 is an apocalyptic number.

It is an amenable number.

12517538344 is a deficient number, since it is larger than the sum of its proper divisors (11307892376).

12517538344 is a wasteful number, since it uses less digits than its factorization.

12517538344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30289 (or 30285 counting only the distinct ones).

The product of its digits is 403200, while the sum is 43.

The spelling of 12517538344 in words is "twelve billion, five hundred seventeen million, five hundred thirty-eight thousand, three hundred forty-four".